<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        // console.log(2 == '2')//true
        // console.log(2 === '2')//false
        let number =+prompt('请输入一个数字')
        if(number % 4 === 0 && number % 100 !== 0){
            alert('true')
        }
        else{
            alert('false')
        }
    </script>
</body>
</html>